Genus: Postoral kineties usually to left of oral poykinetids (Illustrated Guide, 1985).
Left edge is more curved than right edge; cytopharynx with numerous strong fibrils; ectoplasm with
numerous fusiform trichocysts; macronucleus oval; one to several micronulei (Kudo, 1966).
Species: Ovoid, 60-100 μm long; cytostome ovoid; a single macronucleus and single micronucleus anterior; a single contractile vacuole central; numerous large trichocysts (Carey, 1992). Cell body 60-150 μm long (Kahl, 1930). F. acuminata var. angusta: Cell body 80-100 μm long (Kahl, 1930). |
50 μm
100 μm
150 μm; x 400
Frontonia acuminata,
cell body 125 μm long, μm wide,
a single macronucleus anterior, a single contractile vacuole central or just behind equator,
numerous large trichocysts, x 100, x 400, Japan 1998 by Y. Tsukii
50 μm
100 μm
150 μm; x 400
Frontonia acuminata,
cell body 116 μm long, 65 μm wide,
a single macronucleus anterior, a single contractile vacuole central or just behind equator,
numerous large trichocysts, x 100, x 400, Japan 1998 by Y. Tsukii
50 μm
100 μm
150 μm; x 400
F. acuminata Ehrenberg, 1833 (F. acuminata var. angustata Kahl, 1931; F. arenaria Kahl, 1933): Ovoid, 60-100 μm long; cytostome ovoid; a single macronucleus and single micronucleus anterior; a single contractile vacuole central; numerous large trichocysts (Carey, 1992).